Re: [gpsd-dev] Using multiple location sources to improve accuracy and reliability

[Chris Kuethe]

Yes, that's one approach. Be sure to consider:
- surveyed positions of your fixed antennas
- number of mobile devices
- size of vessel
- what happens under marginal signal conditions (do receivers claim to
have a good quality fix but at the wrong position)
- error detection/correction in the app
- loop detection, so that this app does not use its own output like
the output of a receiver.
...

web search for "gps attitude sensor" will give some hints on the
current state of the art.

On Mon, Jul 9, 2012 at 10:33 AM, Richard Allen <address@hidden> wrote:
> You could make a small software package that listens to all the raw feeds.
> It then does some regression on a model of where the sensors are mounted,
> and possibly feed it back to gpsd?
>
> On Jul 9, 2012 12:29 PM, "Chris Kuethe" <address@hidden> wrote:
>>
>> On Mon, Jul 9, 2012 at 10:25 AM, Richard Allen <address@hidden> wrote:
>> > I believe that particular product is installed by the manufacturer or by
>> > a
>> > certified retrofit shop.
>>
>> Indeed.
>>
>> I'm just saying that I don't see any documentation casually laying
>> around that describes the procedures for
>> installing/calibrating/maintaining such a device correctly, either for
>> aircraft or marine use. But simply averaging receivers is going to
>> cause problems.
>>
>> > On Jul 9, 2012 12:23 PM, "Chris Kuethe" <address@hidden> wrote:
>> >>
>> >> On Mon, Jul 9, 2012 at 6:05 AM, Olivier Cornu <address@hidden>
>> >> wrote:
>> >> > What am i getting wrong so far?
>> >> > Is there any chance trunk might come this way, or will i have to hack
>> >> > a
>> >> > solution tailored for my use case?
>> >>
>> >> GPSD is intended to be a multiplexer, not a software solver. There are
>> >> a number of use cases for having multiple sensors reporting back to
>> >> gpsd without it trying to fuse all those reports.
>> >>
>> >> A lazy search for "Garmin G1000 installation manual" doesn't give me
>> >> any documentation on how to install one in an airplane. I bet there's
>> >> a specification on where the receiver and antennas must be installed,
>> >> and then a calibration screen for entering the specifics of that
>> >> particular aircraft. You're going to need to do something similar -
>> >> think on the issues and try some experiments if you want to do sensor
>> >> fusion.
>> >>
>> >> --
>> >> GDB has a 'break' feature; why doesn't it have 'fix' too?
>> >>
>> >
>>
>>
>>
>> --
>> GDB has a 'break' feature; why doesn't it have 'fix' too?



-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?